| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Tresus capax (Gould, 1850) |
Fat gaper | Eastern Pacific | 18 |
| Tresus keenae (Kuroda & Habe, 1950) |
Japanese horse clam | Northwest Pacific | |
| Tresus nuttallii (Conrad, 1837) |
Pacific gaper | Eastern Pacific | 25.4 |